EP0121043B1 - Verfahren zur Herstellung feinverteilter Dispersionen von Metalloxiden in Aluminiumhydroxid - Google Patents
Verfahren zur Herstellung feinverteilter Dispersionen von Metalloxiden in Aluminiumhydroxid Download PDFInfo
- Publication number
- EP0121043B1 EP0121043B1 EP84100659A EP84100659A EP0121043B1 EP 0121043 B1 EP0121043 B1 EP 0121043B1 EP 84100659 A EP84100659 A EP 84100659A EP 84100659 A EP84100659 A EP 84100659A EP 0121043 B1 EP0121043 B1 EP 0121043B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- process according
- metal
- aluminium hydroxide
- metal oxides
- seeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 17
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 17
- 239000006185 dispersion Substances 0.000 title claims abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 14
- 238000002425 crystallisation Methods 0.000 claims abstract description 12
- 230000008025 crystallization Effects 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 12
- 229910000000 metal hydroxide Inorganic materials 0.000 claims abstract description 7
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical class [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000004692 metal hydroxides Chemical class 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 3
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims 5
- 238000010899 nucleation Methods 0.000 claims 4
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 229910001928 zirconium oxide Inorganic materials 0.000 claims 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 26
- 229960005486 vaccine Drugs 0.000 description 10
- 238000002255 vaccination Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- 238000011081 inoculation Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910052776 Thorium Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/628—Coating the powders or the macroscopic reinforcing agents
- C04B35/62802—Powder coating materials
- C04B35/62805—Oxide ceramics
- C04B35/62813—Alumina or aluminates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/144—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/144—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process
- C01F7/145—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process characterised by the use of a crystal growth modifying agent other than aluminium hydroxide seed
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G25/00—Compounds of zirconium
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
- C04B35/117—Composites
- C04B35/119—Composites with zirconium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/486—Fine ceramics
- C04B35/488—Composites
- C04B35/4885—Composites with aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3218—Aluminium (oxy)hydroxides, e.g. boehmite, gibbsite, alumina sol
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
Definitions
- the invention relates to a method for producing finely divided dispersions of metal oxides in aluminum hydroxide.
- hydroxide dispersions Another method for producing hydroxide dispersions is the so-called sol-gel technique, which is used, for example, for the elements uranium, zirconium, thorium, magnesium, zinc, nickel, aluminum and titanium (Journal Amer. Ceramic Soc., Bull. 51, pp. 158-161).
- sol-gel technique which is used, for example, for the elements uranium, zirconium, thorium, magnesium, zinc, nickel, aluminum and titanium.
- the particle size of the starting brine is very small and the solids concentration is usually very low.
- the high water content must first be reduced by extensive filtration. The dried product then has a very low bulk density.
- organometallic compounds which is known in the case of oxide mixtures of ZrO2 ⁇ TiO2 and Al2O3, can be regarded as a further possibility for producing dispersions of various metal oxides in one another. Such a procedure is described in the Journal Amer. Ceramic Soc. 50, pp. 532-577.
- the object of the present invention is to enable the production of finely divided dispersions of metal oxides and / or metal hydroxides in aluminum hydroxide with a low water content, that is to say a high solids concentration in the filter-moist state and homogeneous mixing, by means of a simple, environmentally friendly process.
- the object is achieved by the features specified in the claims.
- the process according to the invention essentially consists in that the metal oxide and / or hydroxide to be dispersed is used as a vaccine for a supersaturated sodium aluminate lye.
- the effectiveness of the process becomes particularly high, if in addition to the metal oxide is vaccinated with aluminum hydroxide, it being particularly favorable to carry out the vaccination with aluminum hydroxide only after the vaccination with the metal oxide has ended.
- all metal oxides and metal hydroxides can be used as vaccines if they are insoluble in sodium aluminate at room temperature.
- the use of oxides of the metals of the third and / or fourth subgroup of the periodic system of the elements is particularly advantageous for the production of cutting ceramics, in an inoculation amount of 2-40% by weight of the aluminum hydroxide dissolved in the aluminate solution.
- zirconium dioxide preferably partially stabilized zirconium dioxide, as the metal oxide.
- oxides of the metals magnesium, cobalt, nickel, zinc, chromium, iron, thorium or oxides of the rare earths can also be used.
- a sodium aluminate solution (140 g Na2O fr. / 1, molar ratio Na2O / Al2O3: 1.6) originating from the Bayer process known for the industrial extraction of Al2O3 was stirred in thermostated beakers and inoculated with ZrO2 (d50: 6.3 ⁇ m).
- the amount of vaccine was 2 g / l, 10 g / l and 20 g / l, respectively.
- the crystallization times were 1, 6, 24, 48, 72 and 96 hours.
- the temperature was 40 ° C in all cases. After 24 hours, when viewed under scanning electron microscopy, all ZrO2 particles have a shell of Al (OH) 3.
- the table below shows the crystallization times of ZrO2 and the percentage yield of the Al (OH) 3 present in the alkali.
- the example shows that the percentage of ZrO2 can be varied widely by varying the amount of vaccine and the crystallization time.
- the crystallization times should be between 24 and 72 hours. Crystallization sets in within 24 hours, but the yield is very low. Above 72 hours, the precipitation proceeds very slowly at vaccination rates of 10 to 50 g / l. In experiments, higher amounts of inoculation have not proven to be useful, since not all ZrO2 particles were enclosed by aluminum hydroxide and there would have been a risk of separation of the ZrO2 particles from the aluminum hydroxide particles during the processing of the precipitate.
- Example 2 was carried out in the same way as Example 1, but the ZrO2 used was ground to a particle size of d50: 1.2 ⁇ m immediately before the vaccination. It turns out that the finer vaccine causes not only a better distribution of the ZrO2 in the mixture due to the small grain size, but also higher yields of Al (OH) 3. In addition to Example 1, the average grain size of the ZrO2 / Al (OH) 3 particles is given.
- Example 3 was carried out analogously to example 2. In addition, however, was vaccinated with Al (OH) 3 in order to further improve the overall yield and to reduce the grain size of the individual grains of the product.
- the ZrO2 vaccine was mixed with 1 g / l of a very fine Al (OH) 3 vaccine (d50: 1.2 ⁇ m).
- the Al (OH) 3 vaccine had previously been ground to the grain size in order to show the highest possible vaccination activity. Crystallization on the vaccine occurs as a competitive reaction to crystallization on ZrO2 and causes the formation of a thinner layer of Al (OH) 3 on the ZrO2 grains.
- the Al (OH) 3 layer can grow without a competitive reaction during the first crystallization phase.
- the result lies in the grain size between Examples 2 and 3.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT84100659T ATE62005T1 (de) | 1983-03-07 | 1984-01-23 | Verfahren zur herstellung feinverteilter dispersionen von metalloxiden in aluminiumhydroxid. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3308008A DE3308008C1 (de) | 1983-03-07 | 1983-03-07 | Verfahren zur Herstellung feinverteilter Dispersionen von Metalloxiden in Aluminiumhydroxid |
| DE3308008 | 1983-03-07 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0121043A2 EP0121043A2 (de) | 1984-10-10 |
| EP0121043A3 EP0121043A3 (en) | 1987-08-19 |
| EP0121043B1 true EP0121043B1 (de) | 1991-03-27 |
Family
ID=6192726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84100659A Expired - Lifetime EP0121043B1 (de) | 1983-03-07 | 1984-01-23 | Verfahren zur Herstellung feinverteilter Dispersionen von Metalloxiden in Aluminiumhydroxid |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4574001A (enrdf_load_stackoverflow) |
| EP (1) | EP0121043B1 (enrdf_load_stackoverflow) |
| JP (1) | JPS59174522A (enrdf_load_stackoverflow) |
| AT (1) | ATE62005T1 (enrdf_load_stackoverflow) |
| BR (1) | BR8400907A (enrdf_load_stackoverflow) |
| DE (2) | DE3308008C1 (enrdf_load_stackoverflow) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4847064A (en) * | 1987-12-23 | 1989-07-11 | Aluminum Company Of America | Economical process for alpha alumina production |
| US4915930A (en) * | 1986-07-31 | 1990-04-10 | Aluminum Company Of America | Process for producing aluminum hydroxide of improved whiteness |
| JPH09132411A (ja) * | 1995-11-02 | 1997-05-20 | Fuji Photo Film Co Ltd | 水酸化アルミニウムの精製方法及びその精製方法を利用した印刷版用支持体の表面処理方法 |
| US6589908B1 (en) * | 2000-11-28 | 2003-07-08 | Shell Oil Company | Method of making alumina having bimodal pore structure, and catalysts made therefrom |
| ITFI20020052A1 (it) * | 2002-03-28 | 2003-09-29 | Consorzio Interuniversitario P | Processo per la preparazione di nano - e micro-particelle di ossidi eidrossidi di metalli del secondo gruppo e di transizione, nano-e micro |
| JP7699023B2 (ja) * | 2021-09-28 | 2025-06-26 | 三菱マテリアル電子化成株式会社 | 酸化アルミニウム系組成物含有窒化ジルコニウム粉末及びその製造方法 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2549549A (en) * | 1947-06-07 | 1951-04-17 | Aluminum Co Of America | Process for producing aluminum trihydrate |
| FR1311147A (fr) * | 1961-05-06 | 1962-12-07 | Electro Chimie Soc D | Procédé de fabrication de l'alumine |
| US3838980A (en) * | 1972-01-12 | 1974-10-01 | Alcan Res & Dev | Precipitation of bayer alumina trihydrate suitable for the manufacture of ceramic grade alumina of improved grindability |
| DE2308019A1 (de) * | 1973-02-17 | 1974-08-22 | Bayer Ag | Herstellung von verstaerkungsfasern auf glaskeramischer basis mit verbessertem elastizitaets-modul |
| US4530699A (en) * | 1979-01-18 | 1985-07-23 | Aluminum Company Of America | Dense phase precipitation |
| US4291010A (en) * | 1979-09-05 | 1981-09-22 | Titan Kogyo Kabushiki Kaisha | Heat stable yellow iron oxides |
| DE3131088C2 (de) * | 1981-08-06 | 1984-11-29 | Vereinigte Aluminium-Werke AG, 1000 Berlin und 5300 Bonn | Verfahren zur Herstellung von Aluminiumhydroxid |
| GB2108098B (en) * | 1981-10-30 | 1985-03-20 | Tioxide Group Plc | Improved pigments and their preparation |
| DE3269635D1 (en) * | 1982-09-02 | 1986-04-10 | Alcoa Chemie Gmbh | Process for the production of alumine |
-
1983
- 1983-03-07 DE DE3308008A patent/DE3308008C1/de not_active Expired
-
1984
- 1984-01-23 DE DE8484100659T patent/DE3484321D1/de not_active Expired - Lifetime
- 1984-01-23 AT AT84100659T patent/ATE62005T1/de not_active IP Right Cessation
- 1984-01-23 EP EP84100659A patent/EP0121043B1/de not_active Expired - Lifetime
- 1984-02-27 BR BR8400907A patent/BR8400907A/pt not_active IP Right Cessation
- 1984-03-06 JP JP59041487A patent/JPS59174522A/ja active Granted
- 1984-03-07 US US06/587,259 patent/US4574001A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE62005T1 (de) | 1991-04-15 |
| JPS59174522A (ja) | 1984-10-03 |
| JPH0429605B2 (enrdf_load_stackoverflow) | 1992-05-19 |
| DE3308008C1 (de) | 1984-10-11 |
| EP0121043A3 (en) | 1987-08-19 |
| EP0121043A2 (de) | 1984-10-10 |
| US4574001A (en) | 1986-03-04 |
| DE3484321D1 (de) | 1991-05-02 |
| BR8400907A (pt) | 1984-10-09 |
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